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남재작,이상학,Nam, Jae Jak,Lee, Sang Hak 대한화학회 2000 대한화학회지 Vol.44 No.5
퇴비 생산업체의 제조현장에서 직접 퇴비의 성분을 분석하기 위한 적외선 분광법의 이용가능성에 대하여 조사하였다. 근적외선 분광법을 이용하여 부산물 퇴비 중의 총 질소 등 8개 성분을 비파괴 동시분석법으로 구한 분석결과는 기존의 화학분석 결과와 비교하여 1 0% 내외의 오차범위에서 일치하였다. 화학분석 결과와 비교한 각 성분의 오차는 총 질소 4.38%, 유기물 5.5%, 인산 11.6%, 총탄소 3.2%, 구리 10.9%, 칼륨 10.6%, 나트륨 11.9% 및 수분 1.5%였다. 근적외선 분광법을 이용한 비파괴 분석은 시료이 제조과정이 간단하고, 여러성분의 동시분석이 가능하므로 단위 공장의 품질관리에 적합할 것으로 판단되었다. The feasibility of near infrared spectroscopy (NIRS) for the evaluation of the compost pro-duced by composting swine excreta has been investigated. The analytes determined were total nitrogen, total phosphorus, organic matter,total carbon,moisture, Cu, $K_2O$ and $Na_2O$. The ranges of concentration of the cal-ibration samples obtained by the conventional chemical method for each component were 1.30-2.75%, 1.45-4.86%, 7.36-81.5%, 23.0-41.1%, 4.2 the coefficient of variation was 4.38, 5.5, 3.2, 1.5, 10.9, 10.6 and 11.9% for total nitrogen, total phosphorus, organic matter, total carbon, moisture, Cu, $K_2O$ and $Na_2O$,respectively. The overall results showed that NlRS can be used for a non-destructive and rapid determination of the analytes to evaluate the quality of compost samples.
POPs의 순환에 미치는 유기물 및 black carbon의 역할
남재작,홍석영,김계훈,Nam Jae-Jak,Hong Suk-Young,Kim Kye-Hoon 환경독성보건학회 2006 환경독성보건학회지 Vol.21 No.3
Soil organic matter (OM) is well documented for its capacity to retain persistent organic pollutants (POPs) and thus is important in dictating the environmental partitioning of POPs between media such as air, water, and soil. Black carbon (BC) is a small component of OM and exhibitt a 10$\sim$100 times greater sorption capacity of POPs than humified OM. Furthermore, due to the inherent long environmental life time of BC, a result of its resistance to physical and biological degradation, POPs can continue to accumulate in BC over a long period of time. The unique properties of BC have been of particular interest over the last 30 years and have resulted in broad research being conducted into its effects of POP cycling in atmospheric, oceanographic and soil matrices. The results of such studies have proved valuable In providing new research initiatives into the role of BC in the cycling of hydrophobic organic compounds (HOCs) as well as giving further insight into the long range atmospheric transport (LRAT) potential and subsequent risk assessment criteria for persistent organic pollutants (POPs). In this report, we introduce a novel study examining the relationships between BC and OM with respect to their POP sorption capacity and discuss the role of BC in influencing the environmental regulation of organic pollutants.
생물검정법을 이용한 하수슬러지 장기연용 토양의 독성평가
남재작 ( Jae Jak Nam ),이승환 ( Seung Hwan Lee ),권순익 ( Soon Ik Kwon ),홍석영 ( Suk Young Hong ),임동규 ( Dong Kyu Lim ),고문환 ( Mun Hwan Koh ),송범헌 ( Beom Hun Song ) 한국환경농학회 2004 한국환경농학회지 Vol.23 No.4
Bioassay was employed to assess toxicity of soil which had been treated with sewage sludges for seven years. The Microtox^(?) and root elongation test of lettuce (Lactuca Saliva) elucidated that the intensity of soil toxicity was closely related with the types and amount of sewage sludges applied. Both bioassay methods proved to be useful in an assessment of soil toxicity and were consistent to some extent with the conventional chemical analysis methods. EC_(50) values resulted from Microtox^(?) were highly correlated with concentration of heavy metals in soils amended with sewage sludges : Cu (r²= 0.86^(**)), Cr (r²= 0.84^(**)), Ni (r²= 0.83^(**)), and Zn (r²= 0.69^(**)). This demonstrated that both bioassay techniques could be employed as tools for soil toxicity assessment when the soil was exposed to solid wastes such as sewage sludge.
남재작 ( Jae Jak Nam ) 한국환경농학회 2022 한국환경농학회 학술대회집 Vol.2022 No.-
우리나라 농림수산 분야 온실가스 배출량은 국가 배출량 대비 3.4%에 불과하여 농업계의 관심이 크지 않다. 그렇지만 글로벌 수준으로 관점을 넓히면 농업과 토지이용 분야의 온실가스 배출량은 27%까지 늘어난다. 우리 정부는 2050년 탄소중립을 선언하고 2030년 온실가스 감축 목표를 설정했다. 농림수산 분야 역시 2030년까지 670만 톤을 감축할 것을 약속했다. 이 발표에서는 국가의 탄소중립 정책을 효과적으로 지원하기 위해 필요한 농업 환경기술의 감축 잠재량을 살펴보고 비용 효과적으로 추진할 수 있는 방안에 대해 논의할 것이다. 그리고 생물다양성, 에너지 전환, 식량안보 등 기후변화 대응과 관련된 쟁점들을 살펴보고 탄소중립 시대를 준비하기 위해 필요한 접근방법론에 대해 다룰 것이다. 이러한 접근을 통해서 농업환경 분야의 쟁점을 명확히 하고 탄소중립에 대한 대응 역량을 강화할 수 있기를 기대한다. The greenhouse gas (GHG) emission in the agriculture, forestry and fishery sector in Korea is only 3.4% of the national emission, so there is not much interest from the agricultural sector. However the proportion of GHG emissions from agriculture, land use and land us changes increases to 27% from a global perspective. The Korean government declared carbon neutrality in 2050 last year and set the target to reduce GHG emissions by 2030. The agriculture, forestry and fisheries sector also promised to cut 6.7 million tons of GHG emission by 2030. In this presentation, the GHG reduction potential of agricultural environmental technologies required to effectively support the country’s carbon-neutral policy will be reviewed, and measures to be implemented cost-effectively will be discussed. In addition, issues related to responding to climate change, such as biodiversity, energy transition, and food security, are examined, and the approach methodologies necessary to prepare for the carbon-neutral era are dealt with in depth. It is expected that the capacity to respond carbon-neutrality in the agricultural environment field will be strengthened through these discussions.